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(No Model.) I 2 Sheets--Sheet l. J. FRIST.

MEGHANIOAL MOVEMENT.

N0.'334,699. PatentedJan. 19, 1886.

I 111mm (No Model.) 2 Sheets-Sheet 2.

J. FRIST.

MBOHANIGAL MOVEMENT.

No. 334,699. Patented Jan. 19, 1886.

WIT/E8858 UNITED STATES PATE T FFICEG MECHANICAL MOVEM ENT.

SPECIFICATION forming part of Letters Patent No. 334,699, dated January19, 1886.

Application filed October 31, 185. Serial No. 181,682. (No model.)

To all whom, it may concern:

Be it known that I, JAMES FRIST, of Balti more city, and State ofMaryland, have in vented certain new and useful Improvements inMechanical Movements; and I do hereby declare that the following is afull, clear, and eX- act description of the invention,which will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and to theletters of reference marked thereon, which form part of thisspecification.

My invention is in the nature of a mechanical movement which may form acomponent part of many machines and devices in general use-such asclamps, Vises, presses for hay, cotton, &c., and many otherswhich willimprove said devices by increasing their capacity, rendering them morereadily operative, and adapting them to a much greater range ofusefulness than has been possible heretofore; and with these ends inviewnmy invention consists in the improved construction, arrangement,and combination of parts, as will be hereinafter fully and accuratelydescribed, and the specific points of novelty in which will be pointedout in the claims annexed to and forming part of this specification.

In the accompanying drawings, Figure l is a top plan view of a devicewhichl have constructed by which to illustrate my invention in severalof its modes of application to machinery now in use. Fig. 2 is a bottomplan view of the same. Fig. 3 is an end elevation of the same device,parts thereof being omitted to render the drawings clear and preventconfusion of lines therein. Fig. 4isapartial end elevation of the same,looking from the left of Fig. 1. Fig. 5 is a partial section through thedevice, taken through the lefthand upper portion of Fig. 1 on line 00,-and Figs. 6 and 7 are detailviews.

Like letters of reference mark the same parts wherever they occur in thedifferent figures.

Referring to the drawings by letters, A is a plate or base-piece ofmetal, upon which all the various devices by which I illustrate theapplication of my invention are supported, and which itself is, by wayof convenience,

mounted on legs B, of any ordinary and wellor similarly formed withplate A, and located longitudinally on the upper surface thereof.

D, E, F, and G are bars placed in relation to each other as the foursides of a rectangle, each of which is shaped in cross-section as adovetail, and has at one end a block secured to it, such blocks beingmarked D, E, F, and G, each of which is provided with a dovetail grooveon one side, in which engages and slides at right angles to eachadjacent dovetail-shaped bar D E F G, respectively, (see Fig. 7,) thebar E sliding in block D on bar D, and at right angles thereto, the barF in block E on bar E, the bar G in block F on bar F, and thebar D inblock G on bar G. These blocks have also dovetail grooves in theirbottoms, (see Fig. 7,) which fit over and slide on dovetail bars H H,(see Fig. 6,) which in their turn have transverse dovetail grooves intheir under sides to fit over and slide on the dovetail rib C on plateA, while each end of the bars H H is shaped to fit under and engage theside of the ribs 0 0 on said plate. The plate A is provided withopeningsa a (1, whose edges are notched, for the purpose of receivingclamp thumb-screws b b, which pass up into the bottom of bar H, wherebyit may be rigidly secured in position, when desired, by turning up saidclamp-screws. It will thus be seen that the bars D, E, F, and G may becaused to approach each other, or a central point between them, by anysuitable power. at I and J. The first of these, I, is a lever mounted ona fulcrum-block, I, secured by a link, "i, to a dovetail block, i, onbar G, and having in its under side a dovetail groove fitting a dovetailbar, H, located at right angles to and reaching from ribs 0 to O onplate A. The second, J,is alever pivoted on afulcrumblock, J, mounted bymeans of a dovetail groove on its under side on a dovetail bar, H,constructed in a manner similar to the bars H H, and secured on rib Oand between ribs 0' and Gin the same manner.

Fig. 6 shows the construction ofbars H, H, and H, and bar H is similar,except the under transverse dovetail groove. By operating these leversthe bars D E F G may be T-headed,

Examples of such power may be seenv brought toward each other, the spaceincluded decreasing in each dimension as this is done. This movement is,as may be seen at a glance, especially applicable to presses-such ashay, cotton, or eiderpressesas well as many other devices, and might ofitself be sufficient to fully illustrate my invention; but in order tomore fully show its application I have shown other devices as follows:

K and L are two vises, each of which, as is well known, having one jawdovetailed and the other grooved to correspond, and moved on each otherby screws. This gives a movement of the jaws toward each other of thetwo sets of jaws. In order to give the opposite movements, I shape thebottom of each vise so that it dovetails in between the two ribs 0 O onplate A, and I make a dovetail groove in the jaw K, of vise K, in whichslides a dovetail bar, L, attached rigidly to the other jaw of the viseK. On the bar L, I mount a block, M, having a dovetail groove to fitover the bar, to which is hinged a bar, N, having serrations n 011 itstop. (See Figs. 3 and 5.) This bar is also dovetailed or T- shaped insection, and moves in a corresponding groove in a block, 0, shaped atits bottom to run in a dovetailed groove in a block, P, placed at rightangles to the block 0, and fitted atv its ends to dovetail between theribs 0 O on plate A. The block 0 is extended upward, forming ears 0 0,between which on a shaft, 0, a forked dog,p. is pivoted, which engagesthe serrations n in bar N. The shaft 0 passes through the forks of thisdog, and between them, on the same shaft, is a lever, Q, whose outerend, q, is curved, so as to engage said serrations, whereby the bar Ncan be pushed forward, carrying with it all its connectionsviz., viseKand held in any position by dog 1). By means of thearrangements shownthis pushing and holding device may be adjusted horizontally in eitherdirection with relation to the vises, and a double ad- It will be seenby this description that my invention has a wide range of usefulness,and may be utilized in many different ways.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. The combination, with plate A, having ribs 0 O, of the four barsplaced at the sides of a rectangle and provided with levers orequivalent devices for moving them simulta neously or separately towarda central included point, the opening being at all times complete,substantially as set forth.

2. The combination, with the plate A, having ribs 0 C 0", of the bars 1)E F G, provided with grooved blocks D, E, F, and G on one of their ends,respectively, each adjacent bar sliding in the groove in the adjoiningblock, and each block having, a groove in its under side to engage barsH H, as set forth.

3. In combination, plate A, having its ribs GOC, the bars H H H, the fuleru m blocks and levers, and the bars D E F G, having doubly-groovedblocks D E F G 011 their ends, all arranged and operating as set forth.

In testimony that I claim the foregoing as my own I hereto affix mysignature in presence of two witnesses.

JAMES FRIST.

Vitnesses:

O. E. DUFFY, JULIUS Sorcnn.

